Various parts in the past few years for my diesels and other's cars-

240D Febi upper control arms and Lemforder motor mounts - I believe from Germany.
A friend got a Chinese upper control arm for his 300D much cheaper, but seemed OK, then sold the car.

Checked a pair of aftermarket Lemforder (German I think) tie-rods for a friends ML430, but the ball-socket on one was too loose so I got them from the dealer.

Awhile ago I got an aftermarket hood-star for a friend's 220 from my local indie Mercedes parts store - no country of origin - that detiriorated rapidly.
So I got the one for my 240D from the dealer - made in Turkey!

Bought a German MANN 240D canister fuel filter, in a Purolator box from Pep-Boys. Same 'Purolator' I inspected at Advance-Auto was cheaper, but contained a no-name Chinese filter.
My indie stocks the German filter much cheaper than Pep or Advance.

Got a Mexican-rebuilt Pep-boys 240D alternator that failed in six months. Replaced with a used one from my friend Chuck Taylor - still going strong after a year.

Aftermarket Chinese 240D flex-disc was rock-hard out of the box, so I got one (German I hope) from the dealer.

The new Pierburg vacuum-pump lever-kit for my 300TD was made in Spain, but the new Pierburg Vacum-pump I wound up using was made in Argentina!

Happy Motoring, Mark

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DrDKW